I wouldn't recommended videos I've seen so far to anyone familiar with C.
I'm not a big fan of video tutorials, one could read the code or write it himself in half the time. I consider it a lazy form of sharing knowledge, as opposed to written text or real, interactive lecture. Ofc there are exceptions like cooking or make-up guides, but programming is not one of them :P

quite nice to see the quake 1 source rewriten from scratch (i tried the original quake 1 source few years ago, and this new one is too much better), so is interesting how this guy explain how full video games are actually built.

most of games nowadays are based in a standard source code, so this video is a clear view about how is made from the beginning. im really surprised how this guy started with a blank visual studio project, nothing pre-written at all. (he must love much programming :lol:)